Oura, smart ring maker, confidentially files for IPO

An Oura smart ring and charging case at MWC Barcelona 2026 in Barcelona, Spain, on Tuesday, March 3, 2026. Angel Garcia | Bloomberg | Getty Images Oura, the maker of the eponymous smart ring that tracks the health and sleep of wearers, has confidentially filed a draft of its IPO prospectus with the Securities and Exchange Commission, the company announced on Thursday. …